Thanks for your reply,Dave.
Maybe,I should modify the rsfwTable_handler routine shown as follows,
/** handles requests for the rsfwTable table */
int
rsfwTable_handler(netsnmp_mib_handler *handler,
netsnmp_handler_registration *reginfo,
netsnmp_agent_request_info *reqinfo,
netsnmp_request_info *requests)
{
netsnmp_request_info *request;
netsnmp_table_request_info *table_info;
struct rsfwTable_entry *table_entry;
switch (reqinfo->mode) {
/*
* Read-support (also covers GetNext requests)
*/
case MODE_GET:
for (request = requests; request; request = request->next) {
table_entry = (struct rsfwTable_entry *)
netsnmp_extract_iterator_context(request);
table_info = netsnmp_extract_table_info(request);
switch (table_info->colnum) {
case COLUMN_RSFWFILES:
snmp_set_var_typed_integer(request->requestvb, ASN_COUNTER,
table_entry->
rsfwFiles);
break;
case COLUMN_RSFWFILESINSCAN:
snmp_set_var_typed_integer(request->requestvb, ASN_COUNTER,
table_entry->
rsfwFilesInScan);
break;
default:
/*
* An unsupported/unreadable column (if applicable)
*/
snmp_set_var_typed_value(request->requestvb,
SNMP_NOSUCHOBJECT, NULL, 0);
}
}
break;
}
DEBUGMSGTL(("rising","END ...handler of antivirusTable\n"));
return SNMP_ERR_NOERROR;
}
you know,I used GDB to debug the agent,and I traced the procedure at
the routine rsfwTable_handler.
gdb>bt
#0 rsfwTable_handler (handler=0x80a1e60, reginfo=0x80a1ea0,
reqinfo=0x80e75c8, requests=0x810ebe0) at rfw/rs.c:332
#1 0xb7e20902 in netsnmp_call_handler (next_handler=0x80a1e60,
reginfo=0x80a1ea0, reqinfo=0x80e75c8, requests=0x810ebe0)
at agent_handler.c:428
#2 0xb7e20f33 in netsnmp_call_next_handler (current=0x80a1b38,
reginfo=0x80a1ea0, reqinfo=0x80e75c8, requests=0x810ebe0)
at agent_handler.c:533
#3 0xb7dfbf09 in netsnmp_table_iterator_helper_handler (handler=0x80a1b38,
reginfo=0x80a1ea0, reqinfo=0x80e75c8, requests=0x810ebe0)
at table_iterator.c:781
#4 0xb7e20902 in netsnmp_call_handler (next_handler=0x80a1b38,
reginfo=0x80a1ea0, reqinfo=0x80e75c8, requests=0x810ebe0)
at agent_handler.c:428
#5 0xb7e20f33 in netsnmp_call_next_handler (current=0x80a28a0,
reginfo=0x80a1ea0, reqinfo=0x80e75c8, requests=0x810ebe0)
at agent_handler.c:533
#6 0xb7e01f3f in table_helper_handler (handler=0x80a28a0,
reginfo=0x80a1ea0,
reqinfo=0x80e75c8, requests=0x810ebe0) at table.c:619
#7 0xb7e20902 in netsnmp_call_handler (next_handler=0x80a28a0,
reginfo=0x80a1ea0, reqinfo=0x80e75c8, requests=0x810ebe0)
at agent_handler.c:428
#8 0xb7e20cf8 in netsnmp_call_handlers (reginfo=0x80a1ea0,
reqinfo=0x80e75c8,
requests=0x810ebe0) at agent_handler.c:509
#9 0xb7e160f7 in handle_var_requests (asp=0x810e218) at snmp_agent.c:2474
#10 0xb7e17478 in handle_pdu (asp=0x810e218) at snmp_agent.c:3251
#11 0xb7e1702d in netsnmp_handle_request (asp=0x810e218, status=1927183776)
gdb>n
0xb7e95d73 358 break;
gdb>n
335 switch (reqinfo->mode) {
gdb>n
342 for (request = requests; request; request = request->next) {
(gdb)
343 table_entry = (struct rsfwTable_entry *)
(gdb)
347 table_info = netsnmp_extract_table_info(request);
(gdb)
0xb7e95ce6 358 break;
(gdb)
352 switch (table_info->colnum) {
(gdb)
361 snmp_set_var_typed_integer(request->requestvb,
ASN_COUNTER,
(gdb)
Program received signal SIGSEGV, Segmentation fault.
0xb7e95b20 in rsfwTable_handler (handler=0x80a1e60,
reginfo=0x80a1ea0, reqinfo=0x0, requests=0x810ebe0) at rfw/rs.c:361
361 snmp_set_var_typed_integer(request->requestvb,
ASN_COUNTER,
so far,we''ve seen that the result the agent received signal SIGSEGV,and
again,I found the pointer reqinfo had been NULL(==0) with using GDB.Here is
its output:
Breakpoint 1, rsfwSysAntivirusTable_handler (handler=0x80a1e60,
reginfo=0x80a1ea0, reqinfo=0x80e75c8, requests=0x810ebe0) at
rfw/rising.c:332
332 DEBUGMSGTL(("rising","handler of antivirusTable\n"));
(gdb) n
0xb7ed1d73 358 break;
(gdb)
335 switch (reqinfo->mode) {
(gdb) p request
$1 = (netsnmp_request_info *) 0xb7ed1910
(gdb) p reqinfo
$2 = (netsnmp_agent_request_info *) 0x0
So,we all will understand why the agent crashed,as you see,the agent works
well after I added some code to assure the POINTERs != NULL.Howerver,I'm not
sure that what I did is right.so,you may help me ?
And I've another question,How add my private MODULE to the default ? You
konw,I mean when everyone use snmpget,snmpwalk and so forth to manipulate my
private OID,there is no need to pass the argument "-m ALL" or something
else equivalent.
Also,in the agent,I've add the lines as follows to the file some.h
config_require(rfw/rs)
config_add_mib(RS-MIB)
config_add_mib(RS-FW-MIB)
Many thanks, Dave!
Best wishes!
Jiang
On 12/22/06, Dave Shield <[EMAIL PROTECTED]> wrote:
On 21/12/06, jiang jilin <[EMAIL PROTECTED]> wrote:
> I've found that agent crashed at function "myTable_handler ".Anynoe can
help
> me resolve the problem?
Try running the agent under a debugger, or running the debugger
on the core file from the crash. A backtrace should indicate
where exactly the crash is occuring.
What does this code look like?
Dave
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